The plant as a whole organism, and ecological factors
Answers are for parents and teachers.
1
Describe the interdependence of organs in basil or another plant in 4β5 sentences.
The root supplies water, the stem conducts, the leaf photosynthesizes and the products go to all organs.
2
Ecological factors table: group β factor β effect on plants (at least 8 rows).
Abiotic: water β turgor; light β photosynthesis; temperature β growth; air β respiration. Biotic: bacteria β nitrogen; animals β seed dispersal; parasite β harm; phytoncide β kills microbes.
3
Grow two seedlings in light and dark and record 10 days of observations.
The one in the dark is pale, elongated and weak; the one in light is green and sturdy.
4
If 5 trees are planted in your neighbourhood and each absorbs about 20 kg of COβ a year (approximate), how many kg do the 5 trees absorb per year?
100
5
How is the fall of the Aral Sea level affecting plants? Write 2β3 sentences.
Soils become saline, toxic salt dust spreads, tugay forests and pastures dry up, plant species decline.